2023–24 Grimsby Town F.C. season

The 2023–24 season is the 146th season in the history of Grimsby Town and their second consecutive season in League Two. The club are participating in League Two, the FA Cup, the EFL Cup, and the 2023–24 EFL Trophy.

Pre-season and friendlies
On 31 May, Grimsby Town announced their pre-season schedule, with friendlies against Grimsby Borough, Cleethorpes Town, Hull City, Lincoln City, Boston United and Fleetwood Town along with a training camp in Spain confirmed. Grimsby confirmed they would play both Port Vale and UAE Pro League side Al-Ain FC at the Real Club de Golf Campoamor Resort in Alicante.


 * Game incorporated four-thirty minute quarters as opposed to using the traditional clock.

Matches
On 22 June, the EFL League Two fixtures were released.

FA Cup
Town were drawn away to Ebbsfleet United or Slough Town in the first round.

EFL Cup
Grimsby were drawn away to Mansfield Town in the first round.

EFL Trophy
In the group stage, Grimsby Town were drawn into Northern Group F alongside Barnsley, Bradford City and Manchester City U21.